User guide

ENGINE SPECIFICATIONS
General Cooling System
Make Generac Cooling System Type Pressurized Closed
EPA Emissions Compliance Stationary Emergency Water Pump Flow 38 gal/min
EPA Emissions Engine Reference See Emissions Data Sheet Fan Type Pusher
Cylinder # 8 Fan Speed (rpm) 2143
Type V Fan Diameter mm (in.) 508 (20)
Displacement - L 5.4 Coolant Heater Wattage 1500
Bore - mm (in.) 90.17 (3.55) Coolant Heater Standard Voltage 120V
Stroke - mm (in.) 105.92 (4.17)
Compression Ratio 9:1
Intake Air Method Naturally Aspirated
Number of Main Bearings 4 Fuel System
Connecting Rods Forged Fuel Type Natural Gas, Propane Vapor
Cylinder Head Aluminum Carburetor Down Draft
Cylinder Liners No Secondary Fuel Regulator Standard
Ignition Single Fire Fuel Shut Off Solenoid Standard
Pistons Aluminum Alloy Operating Fuel Pressure 8" - 14" H2O*
Crankshaft Nodular Iron
Lifter Type Hydraulic *Fuel pressure must remain within specified range and not drop more than 1
in. w.c. from static (no-load) to full load.
Intake Valve Material Steel Alloy
Exhaust Valve Material Hardened Steel
Hardened Valve Seats Yes Engine Electrical System
System Voltage 12VDC
Lubrication System Battery Charging Alternator (Amps) 30
Oil Pump Type Gear Battery Size (at 0ºC) 525/700/925CCA
Oil Filter Type Full-flow spin-on cartridge Battery Group 24/27/31
Crankcase Capacity - L (qts) 5.7 (6) Battery Voltage 12VDC
Ground Polarity Negative
ALTERNATOR SPECIFICATIONS
Standard Model 390 Voltage Regulator Type Full Digital
Poles 4 Number of Sensed Phases 3
Field Type Revolving Regulation Accuracy (Steady State) +/- 0.25%
Insulation Class - Rotor H
Insulation Class - Stator H
Total Harmonic Distortion <5% Engine Governing
Telephone Interference Factor (TIF) <50 Governor Electronic
Standard Excitation Brushless Frequency Regulation (Steady State) +/- 0.25%
Bearings Sealed Ball
Coupling Flexibile Disc
Load Capacity - Standby 40kW
Prototype Short Circuit Test Yes
CODES AND STANDARDS COMPLIANCE (WHERE APPLICABLE)
NFPA 99 BS5514
NFPA 110 SAE J1349
ISO 8528-5 DIN6271
ISO 1708A.5 IEEE C62.41 TESTING
ISO 3046 NEMA ICS 1
UL2200
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G40LG application and engineering data
G40LG 40kW